Back in 2008, paleontologists discovered what appeared to be the fossilized egg of a horned dinosaur. A new study has re-identified it as belonging to — get this — a bird. So how could the original analysis have been so wrong? »6/03/15 2:20pm 6/03/15 2:20pm

Everyone knows that the footprints of prehistoric creatures are rare, and that their fossilized remains are even rarer. But finding footprints and fossils together is almost never heard of, which is what has paleontologists so worked up about the fossilized Protoceratops pictured here. Outlined by a white box is a… »8/05/11 2:40pm 8/05/11 2:40pm